是一个实现数值比较的程序，当1和8同时触发的时候例如12378，显示3，不考虑全部触发的情况（12345678），两端如果不同时触发时，显示最大的数，例如1257，显示7。现在的问题是我的8不见了，第一种情况的判断也就不成立，我改了下判断条件当1和7同时触发时（12367）显示3，这个是正确的结果，1到7单独触发一个数字也能正确显示，8不显示。   帮帮忙，为什么8没了~~~~



#include <AT89X52.H>
#include <stdio.h>

sbit K0=P1^0;
sbit K1=P1^1;
sbit K2=P1^2;
sbit K3=P1^3;
sbit K4=P1^4;
sbit K5=P1^5;
sbit K6=P1^6;
sbit K7=P1^7;

unsigned int length[7]={0};

unsigned int n,i,click=0;
unsigned char s0,s1,s2,s3,s4,s5,s6,s7;
unsigned char start_data=0;


void timer0_ISR (void) interrupt 1
{
//unsigned char i;
click++;
if(click == 200)
    {
    click = 0;
           if(start_data==1)
              {
                  if(length[0]==1&&length[7]==8)
                    {
                      for(i=0;i<=6;i++)
                     {
                       if((length[i+1]-length[i])!=1)
                           {
                              printf("#%d",length[i]);
                              for(n=0;n<=7;n++)
                               {
                                  length[n]=0;
                               }
                              start_data=0;
                              break;
                           }
                     }
                    }
                  
                  
                  else   
                   {     
                     for(i=7;i>=1;i--)
                     {
                        if(length[i]>length[i-1])
                           {
                              printf("#%d",length[i]);
                              for(n=0;n<=7;n++)
                               {
                                  length[n]=0;
                               }
                              start_data=0;
                              break;
                              }
                         if(length[1]<length[0])
                          {
                              printf("#1");
                              for(n=0;n<=7;n++)
                               {
                                  length[n]=0;
                               }
                              start_data=0;
                              break;
                          }                     
                     }
                   }
              }
    }
TH0 = 0x3C;
TL0 = 0xAF;
}   


 
void main(void)
{
   

   
    SCON = 0x50; //&acute;&reg;&iquest;&Uacute;·&frac12;&Ecirc;&frac12;1,&Ocirc;&Ecirc;&ETH;í&frac12;&Oacute;&Ecirc;&Otilde;
    TMOD = 0x20; //&para;¨&Ecirc;±&AElig;÷1&para;¨&Ecirc;±·&frac12;&Ecirc;&frac12;2
    TCON = 0x40; //&Eacute;è&para;¨&Ecirc;±&AElig;÷1&iquest;&ordf;&Ecirc;&frac14;&frac14;&AElig;&Ecirc;&yacute;
    TH1 = 0xfd;    //11.0592MHz 9600&sup2;¨&Igrave;&Oslash;&Acirc;&Ecirc;
    TL1 = 0xfd;
    TH0 = 0x3C;
    TL0 = 0xAF;
    TI = 1;
    TR0 = 1;
    TR1 = 1; //&AElig;&ocirc;&para;&macr;&para;¨&Ecirc;±&AElig;÷
    EA = 1;
    ET0=1;

    while(1)
    {


      if(!K0)
        {
           for(n=0;n<1000;n++);            
                  for(;s0<=1;s0++)
               {
                    length[0]=1;
                      start_data=1;
               }
         }   
           else if(K0)
         {                  
               for(n=0;n<1000;n++);   
               s0=1;
         }                 
      
      if(!K1)
         {
            for(n=0;n<1000;n++);
                  for(;s1<=1;s1++)
               {
                    length[1]=2;
                      start_data=1;   
               }
         }   
           else if(K1)
         {                  
               for(n=0;n<1000;n++);   
               s1=1;
         }
         
       if(!K2)
         {
            for(n=0;n<1000;n++);                  
                  for(;s2<=1;s2++)
               {
                    length[2]=3;
                      start_data=1;   
               }
         }   
           else if(K2)
         {            
               for(n=0;n<1000;n++);   
               s2=1;
         }            

       if(!K3)
         {
            for(n=0;n<1000;n++);            
                  for(;s3<=1;s3++)
               {
                    length[3]=4;
                      start_data=1;
               }
         }   
           else if(K3)
         {            
               for(n=0;n<1000;n++);   
               s3=1;
         }
        
       if(!K4)
         {
            for(n=0;n<1000;n++);               
               for(;s4<=1;s4++)
               {
                    length[4]=5;
                      start_data=1;
               }
         }   
           else if(K4)
         {
            
               for(n=0;n<1000;n++);   
               s4=1;
         }         

       if(!K5)
         {
            for(n=0;n<1000;n++);               
               for(;s5<=1;s5++)
               {
                    length[5]=6;
                      start_data=1;
               }
         }   
           else if(K5)
         {            
               for(n=0;n<1000;n++);   
               s5=1;
         }            

        if(!K6)
         {
            for(n=0;n<1000;n++);   
               for(;s6<=1;s6++)
               {
                    length[6]=7;
                      start_data=1;                    
               }
         }   
           else if(K6)
         {
               for(n=0;n<1000;n++);   
               s6=1;
         }   

       if(!K7)
         {
            for(n=0;n<1000;n++);            
               for(;s7<=1;s7++)
               {
                    length[7]=8;
                      start_data=1;            
               }
         }   
           else if(K7)
         {   
               for(n=0;n<1000;n++);   
               s7=1;
         }      
     }   
}

找到为什么了，错误太低级了，NND，数组定义小了一位，没有外部文件